Add humidity fan controller for toilet, tweak bathroom to match

Add humidity fan controller for toilet, tweak bathroom to match

Turns out WiFi reception here is even worse than in the bathroom. By
switching to esp-idf framework, turning off low power mode *and* setting
the preferred BSSID manually, it does actually work.

Update the bathroom to match. Untested until that actually does get back
on the network, or I go prod at it with a serial cable...